Memory management

Memory management

Types of Operating Systems

• Multi-tasking OS - A multi-tasking operating system allows more than one program to run at the same time - or at least they appear to run concurrently. eg Windows, OS X, Linux and Android

• Multi-user OS - There is a single computer (the mainframe) with the OS, then multiple terminals/workstations, that are not running their own operating systems,

• Distributed OS - A group of computers called a 'cluster', work together to undertake a single computer-intensive task. Each computer contains part of the overall operating system.

Types of operating system

• Real Time OS - It is extremely reliable and has very precise and consistent timings. If two inputs arrive at the same time, the RTOS programmer is able to set a priority to them. eg factory production, car management

• Embedded OS - An embedded system is a microprocessor designed to perform a dedicated function, as a part of a larger piece of equipment. These devices need an embedded OS to run.

• Batch OS - A mainframe computer that is designed for huge repetitive data processing, eg doing the same task over and over again. For example, a mainframe set up to process 30 million pension statements, each one calculated for a specific customer.

Multiple Choice

Which operating system would be used in a robotic production line?

• Distributed OS

• Batch OS

• Real Time OS

• Multi User OS

• Multi Tasking OS

Multiple Choice

Which operating system would be used for a cluster of computers trying to work out the spread of the coronavirus?

• Distributed OS

• Batch OS

• Embedded OS

• Multi User OS

• Multi Tasking OS

Multiple Choice

Which operating system would be used for a computer that appears to run multiple programs concurrently?

• Distributed OS

• Batch OS

• Embedded OS

• Multi User OS

• Multi Tasking OS

Multiple Choice

Which operating system would be used in a DVD player?

• Distributed OS

• Batch OS

• Embedded OS

• Multi User OS

• Multi Tasking OS

Multiple Choice

How many purposes were mentioned for memory management?

• 1

• 3

• 5

• 7

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Memory management handles or manages

memory

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Memory management

processes back and forth between main memory and disk during execution.

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Memory management keeps track of each and every memory

, regardless of whether it is allocated to some process or it is free.

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Memory management checks how much

is to be allocated to processes

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Memory management decides which

will get memory at what time

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Memory management tracks whenever some memory gets freed or unallocated and correspondingly it updates the

.

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Memory management takes care of mapping the logical addresses to

addresses